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Blödorn GB, Sacramento M, Sandagorda EMA, Lima AS, Reis JS, Silva MS, Alves D. Silver-catalyzed synthesis of symmetrical diaryl tellurides from arylboronic acids and tellurium. NEW J CHEM 2022. [DOI: 10.1039/d2nj04019k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The synthesis of symmetrical tellurides from different arylboronic acids and elemental tellurium using AgNO3 as a catalyst was performed.
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Affiliation(s)
- Gustavo B. Blödorn
- Laboratório de Síntese Orgânica Limpa – LASOL – CCQFA – Universidade Federal de Pelotas – UFPel, P.O. Box 354 – 96010-900, Pelotas, RS, Brazil
| | - Manoela Sacramento
- Laboratório de Síntese Orgânica Limpa – LASOL – CCQFA – Universidade Federal de Pelotas – UFPel, P.O. Box 354 – 96010-900, Pelotas, RS, Brazil
| | - Eduardo M. A. Sandagorda
- Laboratório de Síntese Orgânica Limpa – LASOL – CCQFA – Universidade Federal de Pelotas – UFPel, P.O. Box 354 – 96010-900, Pelotas, RS, Brazil
| | - Ariana S. Lima
- Laboratório de Síntese Orgânica Limpa – LASOL – CCQFA – Universidade Federal de Pelotas – UFPel, P.O. Box 354 – 96010-900, Pelotas, RS, Brazil
| | - Joel S. Reis
- Institute of Chemistry, Fluminense Federal University, UFF, CEP: 24020-141, Niteroi, RJ, Brazil
| | - Márcio S. Silva
- Laboratório de Síntese Orgânica Limpa – LASOL – CCQFA – Universidade Federal de Pelotas – UFPel, P.O. Box 354 – 96010-900, Pelotas, RS, Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa – LASOL – CCQFA – Universidade Federal de Pelotas – UFPel, P.O. Box 354 – 96010-900, Pelotas, RS, Brazil
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2
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do Sacramento M, Menezes L, Goldani B, Perin G, Silva MS, Barcellos T, Alves D. Synthesis of alkynyltellurides mediated by K 3PO 4 and DMSO. NEW J CHEM 2019. [DOI: 10.1039/c9nj01995b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of diorganyl ditellurides with terminal alkynes is described using K3PO4 as a catalyst.
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Affiliation(s)
| | - Larissa Menezes
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
| | - Bruna Goldani
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
| | - Gelson Perin
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
| | - Marcio S. Silva
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products
- University of Caxias do Sul
- Caxias do Sul
- Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
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3
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Bandeira PT, Dalmolin MC, de Oliveira MM, Nunes KC, Garcia FP, Nakamura CV, de Oliveira ARM, Piovan L. Synthesis, Antioxidant Activity and Cytotoxicity of N-Functionalized Organotellurides. Bioorg Med Chem 2018; 27:410-415. [PMID: 30554969 DOI: 10.1016/j.bmc.2018.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/28/2018] [Accepted: 12/10/2018] [Indexed: 12/30/2022]
Abstract
The use of antioxidants is the most effective means to protect the organism against cellular damage caused by oxidative stress. In this context, organotellurides have been described as promising antioxidant agents for decades. Herein, a series of N-functionalized organotellurium compounds has been tested as antioxidant and presented remarkable activities by three different in vitro chemical assays. They were able to reduce DPPH radical with IC50 values ranging from 5.08 to 19.20 µg mL-1, and some of them also reduced ABTS+ radical and TPTZ-Fe3+ complex in ABTS+ and FRAP assays, respectively. Initial structure-activity relationship discloses that the nature of N-substituent strongly influenced both activity and cytotoxicity of the studied compounds. Furthermore, radical scavenging activities of N-functionalized organotellurides have been compared with those of their selenilated congeners, demonstrating that the presence of tellurium atom has an essential role in antioxidant activity.
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Affiliation(s)
- Pamela T Bandeira
- Departamento de Química, Universidade Federal do Paraná, Curitiba 4106902, Brazil
| | - Mara C Dalmolin
- Departamento de Química, Universidade Federal do Paraná, Curitiba 4106902, Brazil
| | - Mariana M de Oliveira
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | - Karine C Nunes
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | - Francielle P Garcia
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | - Celso V Nakamura
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | | | - Leandro Piovan
- Departamento de Química, Universidade Federal do Paraná, Curitiba 4106902, Brazil.
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Goldani B, do Sacramento M, Lenardão EJ, Schumacher RF, Barcellos T, Alves D. Synthesis of symmetrical and unsymmetrical tellurides via silver catalysis. NEW J CHEM 2018. [DOI: 10.1039/c8nj01998c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The cross-coupling reaction of diaryl ditellurides with aryl boronic acids is described using AgNO3 as a catalyst.
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Affiliation(s)
- Bruna Goldani
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
| | | | - Eder J. Lenardão
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
| | | | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products, University of Caxias do Sul
- Caxias do Sul
- Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa
- LASOL
- CCQFA
- Universidade Federal de Pelotas
- UFPel
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5
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Fonseca SF, Padilha NB, Thurow S, Roehrs JA, Savegnago L, de Souza MN, Fronza MG, Collares T, Buss J, Seixas FK, Alves D, Lenardão EJ. Ultrasound-promoted copper-catalyzed synthesis of bis-arylselanyl chrysin derivatives with boosted antioxidant and anticancer activities. ULTRASONICS SONOCHEMISTRY 2017; 39:827-836. [PMID: 28733012 DOI: 10.1016/j.ultsonch.2017.06.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Revised: 06/08/2017] [Accepted: 06/09/2017] [Indexed: 05/21/2023]
Abstract
Herein we report the use of ultrasonic irradiation (US) in the synthesis of six new semi-synthetic selenium-containing chrysin derivatives by a simple and effective methodology utilizing CuI as catalyst, in good to excellent yields (60-89%). It was observed that US accelerates the reaction compared to conventional heating with excellent selectivity for diselenylated products. Compounds were tested for their antioxidant and anticancer activities in vitro and it was observed that the presence of selenium in the A-ring of chrysin enhanced both antioxidant and anticancer properties. Semi-synthetic 6,8-bis(o-tolylselanyl)-chrysin 3b has the best radical scavenging activity of DPPH (Imax: 39.79µM) and ABTS+ (IC50: 6.5µM) radicals. Similarly, in the Reactive Species (RS) assay, 3b showed high antioxidant activity in mice cortex (IC50: 5.67µM), whereas 6,8-bis(p-anisoylselanyl)-chrysin 3c was the more active in the hippocampus (IC50: 5.63µM). The Se-chrysins were effective in prevention of lipid peroxidation, highlighting 6,8-bis(p-fluorophenylselanyl)-chrysin 3d in cortex (IC50: 0.54µM) and 3b in hippocampus (IC50: 0.27µM). In addition, 3d was effective in inhibiting human lung adenocarcinoma (A549) cells growth, with a IC50 of 19.9µM after 72h of treatment, while 6,8-bis(p-anisoylselanyl)-chrysin 3c presented the higher antiproliferative activity after 48h of treatment (IC50 of 41.4µM).
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Affiliation(s)
- Sergio F Fonseca
- Laboratório de Síntese Orgânica Limpa - LASOL, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900 Pelotas, RS, Brazil
| | - Nathalia B Padilha
- Laboratório de Síntese Orgânica Limpa - LASOL, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900 Pelotas, RS, Brazil
| | - Samuel Thurow
- Laboratório de Síntese Orgânica Limpa - LASOL, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900 Pelotas, RS, Brazil
| | - Juliano A Roehrs
- Laboratório de Síntese Orgânica Limpa - LASOL, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900 Pelotas, RS, Brazil
| | - Lucielli Savegnago
- Grupo de Pesquisa em Neurobiotecnologia - GPN, Universidade Federal de Pelotas - UFPel, 96010-900 Pelotas, RS, Brazil
| | - Maurice N de Souza
- Grupo de Pesquisa em Neurobiotecnologia - GPN, Universidade Federal de Pelotas - UFPel, 96010-900 Pelotas, RS, Brazil
| | - Mariana G Fronza
- Grupo de Pesquisa em Neurobiotecnologia - GPN, Universidade Federal de Pelotas - UFPel, 96010-900 Pelotas, RS, Brazil
| | - Tiago Collares
- Laboratório de Biotecnologia do Câncer, Universidade Federal de Pelotas - UFPel, 96010-900 Pelotas, RS, Brazil
| | - Julieti Buss
- Laboratório de Biotecnologia do Câncer, Universidade Federal de Pelotas - UFPel, 96010-900 Pelotas, RS, Brazil
| | - Fabiana K Seixas
- Laboratório de Biotecnologia do Câncer, Universidade Federal de Pelotas - UFPel, 96010-900 Pelotas, RS, Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa - LASOL, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900 Pelotas, RS, Brazil
| | - Eder J Lenardão
- Laboratório de Síntese Orgânica Limpa - LASOL, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900 Pelotas, RS, Brazil.
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Ferraz MC, Mano RA, Oliveira DH, Maia DSV, Silva WP, Savegnago L, Lenardão EJ, Jacob RG. Synthesis, Antimicrobial, and Antioxidant Activities of Chalcogen-Containing Nitrone Derivatives from (R)-citronellal. MEDICINES 2017; 4:medicines4020039. [PMID: 28930254 PMCID: PMC5590075 DOI: 10.3390/medicines4020039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/01/2017] [Accepted: 06/05/2017] [Indexed: 01/02/2023]
Abstract
Background: The main constituents of Cymbopogonnardus (L) Rendle and C. citratus (DC) Stapfessential oils are (R)-citronellal and citral, respectively. Organochalcogen compounds can boost the biological activities of natural products. Methods: Several chalcogen-containing nitrones derived from (R)-citronellal and citral were prepared and evaluated for their antimicrobial and antioxidant activities. The antimicrobial activity was evaluated by the disc diffusion test and the antioxidant properties were evaluated in vitro by DPPH (1,1-diphenyl-2-picryl-hydrazyl), ABTS (2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid), and FRAP (ferric ion reducing antioxidant power) assays. Results: In the antimicrobial assay, (E)-N,3,7-trimethyl-3-(phenylthio)oct-6-en-1-imine oxide 5c exhibited halos between 21.5 mm (Escherichia coli O157:H7) and 26.0 mm (Listeria monocytogenes), while (E)-N,3,7-trimethyloct-6-en-1-imine oxide 5d presented halos between 22.5 mm (E. coli O157:H7) and 31.0 mm (L. monocytogenes). (E)-N,3,7-Trimethyl-2-(phenylthio)oct-6-en-1-imine oxide 5a showed the lowest minimal inhibitory concentration (MIC) value against Bacillus cereus (0.48 mM), and 5c was the most potent bactericide, with a minimal bactericidal concentration (MBC) of 0.52 mM for E. coli O157:H7. In the antioxidant assays, 5c, 5d, and 10 ((E)-3,7-dimethyl-2-(phenylselanyl)oct-6-enal oxime) were the most actives in the DPPH, ABTS, and FRAP assays, respectively. Conclusions: The presence of a phenylthio group in the nitrone increases its antimicrobial activity against Gram-positive and Gram-negative foodborne pathogens in the disk diffusion test and the antioxidant activity in vitro.
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Affiliation(s)
- Mariana C Ferraz
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Renata A Mano
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Daniela H Oliveira
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Darla S V Maia
- Faculdade de Agronomia Eliseu Maciel, DCTA, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Wladimir P Silva
- Faculdade de Agronomia Eliseu Maciel, DCTA, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Lucielli Savegnago
- Centro de Desenvolvimento Tecnológico, Unidade Biotecnologia, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Eder J Lenardão
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Raquel G Jacob
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
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7
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Glycerol as Precursor of Organoselanyl and Organotellanyl Alkynes. Molecules 2017; 22:molecules22030391. [PMID: 28257120 PMCID: PMC6155406 DOI: 10.3390/molecules22030391] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 02/22/2017] [Accepted: 02/28/2017] [Indexed: 11/16/2022] Open
Abstract
Herein we describe the synthesis of organoselanyl and organotellanyl alkynes by the addition of lithium alkynylchalcogenolate (Se and Te) to tosyl solketal, easily obtained from glycerol. The alkynylchalcogenolate anions were generated in situ and added to tosyl solketal in short reaction times, furnishing in all cases the respective products of substitution in good yields. Some of the prepared compounds were deprotected using an acidic resin to afford new water-soluble 3-organotellanylpropane-1,2-diols. The synthetic versatility of the new chalcogenyl alkynes was demonstrated in the iodocyclization of 2,2-dimethyl-1,3-dioxolanylmethyl(2-methoxyphenylethynyl)selane 3f, which afforded 3-iodo-2-(2,2-dimethyl-1,3-dioxolanylmethyl) selenanylbenzo[b]furan in 85% yield, opening a new way to access water-soluble Se-functionalized benzo[b]furanes.
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Soares LK, Silva RB, Peglow TJ, Silva MS, Jacob RG, Alves D, Perin G. Selective Synthesis of Vinyl- or Alkynyl Chalcogenides from Glycerol and their Water-Soluble Derivatives. ChemistrySelect 2016. [DOI: 10.1002/slct.201600338] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Liane K. Soares
- LASOL - Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 - 96010-900 Pelotas, RS Brazil
| | - Rafaela B. Silva
- LASOL - Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 - 96010-900 Pelotas, RS Brazil
| | - Thiago J. Peglow
- LASOL - Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 - 96010-900 Pelotas, RS Brazil
| | - Márcio S. Silva
- Centro de Ciências Naturais e Humanas - CCNH; Universidade Federal do ABC - UFABC; Av. dos Estados 5001 09210-580 Santo André, SP Brazil
| | - Raquel G. Jacob
- LASOL - Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 - 96010-900 Pelotas, RS Brazil
| | - Diego Alves
- LASOL - Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 - 96010-900 Pelotas, RS Brazil
| | - Gelson Perin
- LASOL - Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 - 96010-900 Pelotas, RS Brazil
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9
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Perin G, Alves D, Jacob RG, Barcellos AM, Soares LK, Lenardão EJ. Synthesis of Organochalcogen Compounds using Non-Conventional Reaction Media. ChemistrySelect 2016. [DOI: 10.1002/slct.201500031] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Gelson Perin
- Laboratório de Síntese Orgânica Limpa - LASOL -; Universidade Federal de Pelotas - UFPel -; P.O. Box 354 96010-900 Pelotas - RS - Brazil, Tel: +55 (53) 3275-7533
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa - LASOL -; Universidade Federal de Pelotas - UFPel -; P.O. Box 354 96010-900 Pelotas - RS - Brazil, Tel: +55 (53) 3275-7533
| | - Raquel G. Jacob
- Laboratório de Síntese Orgânica Limpa - LASOL -; Universidade Federal de Pelotas - UFPel -; P.O. Box 354 96010-900 Pelotas - RS - Brazil, Tel: +55 (53) 3275-7533
| | - Angelita M. Barcellos
- Laboratório de Síntese Orgânica Limpa - LASOL -; Universidade Federal de Pelotas - UFPel -; P.O. Box 354 96010-900 Pelotas - RS - Brazil, Tel: +55 (53) 3275-7533
| | - Liane K. Soares
- Laboratório de Síntese Orgânica Limpa - LASOL -; Universidade Federal de Pelotas - UFPel -; P.O. Box 354 96010-900 Pelotas - RS - Brazil, Tel: +55 (53) 3275-7533
| | - Eder J. Lenardão
- Laboratório de Síntese Orgânica Limpa - LASOL -; Universidade Federal de Pelotas - UFPel -; P.O. Box 354 96010-900 Pelotas - RS - Brazil, Tel: +55 (53) 3275-7533
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10
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Mirjani R, Faramarzi MA, Sharifzadeh M, Setayesh N, Khoshayand MR, Shahverdi AR. Biosynthesis of tellurium nanoparticles by Lactobacillus plantarum and the effect of nanoparticle-enriched probiotics on the lipid profiles of mice. IET Nanobiotechnol 2016; 9:300-5. [PMID: 26435284 DOI: 10.1049/iet-nbt.2014.0057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Hypercholesterolemia is an important risk factor contributing to atherosclerosis and coronary heart disease. Lactic acid bacteria have attracted much attention regarding their promising effect on serum cholesterol levels. Tellurium (Te) is a rare element that has also gained considerable interest for its biological effects. There have been some recent in vivo reports on the reduction effect of Te on cholesterol content. In this study, Lactobacillus plantarum PTCC 1058 was employed for the intracellular biosynthesis of Te NPs. The UV-visible spectrum of purified NPs showed a peak at 214 nm related to the surface plasmon resonance of the Te NPs. Transmission electron microscopy showed that spherical nanoparticles without aggregation had the average size of 45.7 nm as determined by the laser scattering method. The energy dispersive X-ray pattern confirmed the presence of Te atoms without any impurities. A significant reduction was observed in group which received L. plantarum with or without Te NPs during propylthiouracil and cholesterol diet in compare with the control group which received just propylthiouracil and cholesterol. The levels of triglycerides also remarkably decrease (p<0.05) in mice given L. plantarum with intracellular Te NPs.
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Affiliation(s)
- Ruholah Mirjani
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Faramarzi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Sharifzadeh
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Setayesh
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Khoshayand
- Department of Drug and Food Control, Faculty of Pharmacy and Pharmaceutical Quality Assurance Research Center, Tehran University of Medical Sciences Tehran, Iran
| | - Ahmad Reza Shahverdi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
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11
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Fonseca SF, Lima DB, Alves D, Jacob RG, Perin G, Lenardão EJ, Savegnago L. Synthesis, characterization and antioxidant activity of organoselenium and organotellurium compound derivatives of chrysin. NEW J CHEM 2015. [DOI: 10.1039/c4nj02329c] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New selenium and tellurium containing chrysin derivatives were synthesized and their antioxidant activities were evaluated. Butyltelluro-chrysin presented better antioxidant activities.
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Affiliation(s)
- Sergio F. Fonseca
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas - UFPel
- CEP 96010-900
- Pelotas
- Brazil
| | - David B. Lima
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas - UFPel
- CEP 96010-900
- Pelotas
- Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas - UFPel
- CEP 96010-900
- Pelotas
- Brazil
| | - Raquel G. Jacob
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas - UFPel
- CEP 96010-900
- Pelotas
- Brazil
| | - Gelson Perin
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas - UFPel
- CEP 96010-900
- Pelotas
- Brazil
| | - Eder João Lenardão
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas - UFPel
- CEP 96010-900
- Pelotas
- Brazil
| | - Lucielli Savegnago
- Grupo de Pesquisa em Neurobiotecnologia - GPN
- CDTec
- Universidade Federal de Pelotas
- UFPel
- Pelotas
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12
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Nobre PC, Borges EL, Silva CM, Casaril AM, Martinez DM, Lenardão EJ, Alves D, Savegnago L, Perin G. Organochalcogen compounds from glycerol: Synthesis of new antioxidants. Bioorg Med Chem 2014; 22:6242-9. [DOI: 10.1016/j.bmc.2014.08.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/08/2014] [Accepted: 08/18/2014] [Indexed: 12/17/2022]
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13
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Gonçalves LC, Victória FN, Lima DB, Borba PM, Perin G, Savegnago L, Lenardão EJ. CuI/glycerol mediated stereoselective synthesis of 1,2-bis-chalcogen alkenes from terminal alkynes: synthesis of new antioxidants. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.07.109] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wollenhaupt SGN, Soares AT, Salgueiro WG, Noremberg S, Reis G, Viana C, Gubert P, Soares FA, Affeldt RF, Lüdtke DS, Santos FW, Denardin CC, Aschner M, Avila DS. Seleno- and telluro-xylofuranosides attenuate Mn-induced toxicity in C. elegans via the DAF-16/FOXO pathway. Food Chem Toxicol 2013; 64:192-9. [PMID: 24296137 DOI: 10.1016/j.fct.2013.11.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 11/04/2013] [Accepted: 11/22/2013] [Indexed: 01/12/2023]
Abstract
Organochalcogens are promising pharmacological agents that possess significant biological activities. Nevertheless, because of the complexity of mammalian models, it has been difficult to determine the molecular pathways and specific proteins that are modulated in response to treatments with these compounds. The nematode worm Caenorhabditis elegans is an alternative experimental model that affords easy genetic manipulations, green fluorescent protein tagging and in vivo live analysis of toxicity. Abundant evidence points to oxidative stress in mediating manganese (Mn)-induced toxicity. In this study we challenged worms with Mn, and investigated the efficacy of inedited selenium- and tellurium-xylofuranosides in reversing and/or protecting the worms from Mn-induced toxicity. In addition, we investigated their putative mechanism of action. First, we determined the lethal dose 50% (LD50) and the effects of the xylofuranosides on various toxic parameters. This was followed by studies on the ability of xylofuranosides to afford protection against Mn-induced toxicity. Both Se- and Te-xylofuranosides increased the expression of superoxide dismutase (SOD-3). Furthermore, we observed that the xylofuranosides induced nuclear translocation of the transcription factor DAF-16/FOXO, which in the worm is known to regulate stress responsiveness, aging and metabolism. These findings suggest that xylofuranosides attenuate toxicity Mn-induced, by regulating the DAF-16/FOXO signaling pathway.
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Affiliation(s)
- Suzi G N Wollenhaupt
- Laboraterio do Grupo de Pesquisa em Bioquímica e Toxicologia em Caenorhabditis elegans (GBToxCe), Universidade Federal do Pampa - UNIPAMPA, CEP 97500-970, Uruguaiana, RS, Brazil
| | - Ana Thalita Soares
- Laboraterio do Grupo de Pesquisa em Bioquímica e Toxicologia em Caenorhabditis elegans (GBToxCe), Universidade Federal do Pampa - UNIPAMPA, CEP 97500-970, Uruguaiana, RS, Brazil
| | - Willian G Salgueiro
- Laboraterio do Grupo de Pesquisa em Bioquímica e Toxicologia em Caenorhabditis elegans (GBToxCe), Universidade Federal do Pampa - UNIPAMPA, CEP 97500-970, Uruguaiana, RS, Brazil
| | - Simone Noremberg
- Departamento de Química, Universidade Federal de Santa Maria - UFSM, CEP 97105-900, Santa Maria, RS, Brazil
| | - Gabriel Reis
- Departamento de Química, Universidade Federal de Santa Maria - UFSM, CEP 97105-900, Santa Maria, RS, Brazil
| | - Carine Viana
- Departamento de Química, Universidade Federal de Santa Maria - UFSM, CEP 97105-900, Santa Maria, RS, Brazil
| | - Priscila Gubert
- Departamento de Química, Universidade Federal de Santa Maria - UFSM, CEP 97105-900, Santa Maria, RS, Brazil
| | - Felix A Soares
- Departamento de Química, Universidade Federal de Santa Maria - UFSM, CEP 97105-900, Santa Maria, RS, Brazil
| | - Ricardo F Affeldt
- Instituto de Química, Universidade Federal do Rio Grande do Sul - UFRGS, CEP 91501-970, Porto Alegre, RS, Brazil
| | - Diogo S Lüdtke
- Instituto de Química, Universidade Federal do Rio Grande do Sul - UFRGS, CEP 91501-970, Porto Alegre, RS, Brazil
| | - Francielli W Santos
- Laboratório de Biotecnologia da Reprodução (Biotech), Campus Uruguaiana, Universidade Federal do Pampa - UNIPAMPA, CEP 97500-970, Uruguaiana, RS, Brazil
| | - Cristiane C Denardin
- Laboraterio do Grupo de Pesquisa em Bioquímica e Toxicologia em Caenorhabditis elegans (GBToxCe), Universidade Federal do Pampa - UNIPAMPA, CEP 97500-970, Uruguaiana, RS, Brazil
| | - Michael Aschner
- Division of Clinical Pharmacology and Pediatric Toxicology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37240, USA
| | - Daiana S Avila
- Laboraterio do Grupo de Pesquisa em Bioquímica e Toxicologia em Caenorhabditis elegans (GBToxCe), Universidade Federal do Pampa - UNIPAMPA, CEP 97500-970, Uruguaiana, RS, Brazil.
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15
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Quines CB, Rosa SG, Neto JSS, Zeni G, Nogueira CW. Phenylethynyl-butyltellurium inhibits the sulfhydryl enzyme Na+, K+ -ATPase: an effect dependent on the tellurium atom. Biol Trace Elem Res 2013; 155:261-6. [PMID: 23955422 DOI: 10.1007/s12011-013-9781-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 08/05/2013] [Indexed: 01/08/2023]
Abstract
Organotellurium compounds are known for their toxicological effects. These effects may be associated with the chemical structure of these compounds and the oxidation state of the tellurium atom. In this context, 2-phenylethynyl-butyltellurium (PEBT) inhibits the activity of the sulfhydryl enzyme, δ-aminolevulinate dehydratase. The present study investigated on the importance of the tellurium atom in the PEBT ability to oxidize mono- and dithiols of low molecular weight and sulfhydryl enzymes in vitro. PEBT, at high micromolar concentrations, oxidized dithiothreitol (DTT) and inhibited cerebral Na(+), K(+)-ATPase activity, but did not alter the lactate dehydrogenase activity. The inhibition of cerebral Na(+), K(+)-ATPase activity was completely restored by DTT. By contrast, 2-phenylethynyl-butyl, a molecule without the tellurium atom, neither oxidized DTT nor altered the Na(+), K(+)-ATPase activity. In conclusion, the tellurium atom of PEBT is crucial for the catalytic oxidation of sulfhydryl groups from thiols of low molecular weight and from Na(+), K(+)-ATPase.
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Affiliation(s)
- Caroline B Quines
- Laboratório de Síntese, Reatividade e Avaliação Farmacológica e Toxicológica de Organocalcogênios, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP, 97105-900, RS, Brazil
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16
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Meinerz DF, Comparsi B, Allebrandt J, Mariano DOC, Dos Santos DB, Zemolin APP, Farina M, Dafre LA, Rocha JBT, Posser T, Franco JL. Sub-acute administration of (S)-dimethyl 2-(3-(phenyltellanyl) propanamido) succinate induces toxicity and oxidative stress in mice: unexpected effects of N-acetylcysteine. SPRINGERPLUS 2013; 2:182. [PMID: 23658858 PMCID: PMC3644195 DOI: 10.1186/2193-1801-2-182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 04/16/2013] [Indexed: 12/21/2022]
Abstract
The organic tellurium compound (S)-dimethyl 2-(3-(phenyltellanyl) propanamide) succinate (TeAsp) exhibits thiol-peroxidase activity that could potentially offer protection against oxidative stress. However, data from the literature show that tellurium is a toxic agent to rodents. In order to mitigate such toxicity, N-acetylcysteine (NAC) was administered in parallel with TeAsp during 10 days. Mice were separated into four groups receiving daily injections of (A) vehicle (PBS 2.5 ml/kg, i.p. and DMSO 1 ml/kg, s.c.), (B) NAC (100 mg/kg, i.p. and DMSO s.c.), (C) PBS i.p. and TeAsp (92.5 μmol/kg, s.c), or (D) NAC plus TeAsp. TeAsp treatment started on the fourth day. Vehicle or NAC-treated animals showed an increase in body weight whereas TeAsp caused a significant reduction. Contrary to expected, NAC co-administration potentiated the toxic effect of TeAsp, causing a decrease in body weight. Vehicle, NAC or TeAsp did not affect the exploratory and motor activity in the open-field test at the end of the treatment, while the combination of NAC and TeAsp produced a significant decrease in these parameters. No DNA damage or alterations in cell viability were observed in leukocytes of treated animals. Treatments produced no or minor effects on the activities of antioxidant enzymes catalase, glutathione peroxidase and glutathione reductase, whereas the activity of the thioredoxin reductase was decreased in the brain and increased the liver of the animals in the groups receiving TeAsp or TeAsp plus NAC. In conclusion, the toxicity of TeAsp was potentiated by NAC and oxidative stress appears to play a central role in this process.
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Affiliation(s)
- Daiane F Meinerz
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS CEP 97105-900 Brazil
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17
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Rocha JBT, Saraiva RA, Garcia SC, Gravina FS, Nogueira CW. Aminolevulinate dehydratase (δ-ALA-D) as marker protein of intoxication with metals and other pro-oxidant situations. Toxicol Res (Camb) 2012. [DOI: 10.1039/c2tx20014g] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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18
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Pinton S, Luchese C, Nogueira CW. Comparison of the antioxidant properties and the toxicity of p,p'-dichlorodiphenyl ditelluride with the parent compound, diphenyl ditelluride. Biol Trace Elem Res 2011; 139:204-16. [PMID: 20191388 DOI: 10.1007/s12011-010-8645-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Accepted: 02/04/2010] [Indexed: 10/19/2022]
Abstract
The hypothesis to be tested in this study is whether the introduction of the chloro group into diphenyl ditelluride molecule (p,p'-dichlorodiphenyl ditelluride, compound 1b) alters the antioxidant and scavenging activity of diphenyl ditelluride (compound 1a) in vitro. The results revealed that 1a and 1b had a potent antioxidant activity in vitro. However, the introduction of a functional group, chloro, into diphenyl ditelluride molecule (1b) did not cause great alterations in the antioxidant action of diphenyl ditelluride against lipid peroxidation, protein carbonyl, and scavenging of 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonate) and 2,2'-diphenyl-1-picrylhydrazyl radicals. Based on the in vitro results, different doses (0.25 and 0.75 µmol/kg) of 1a and 1b or vehicle (canola oil, 1 ml/kg) were administered to rats to investigate if the presence of chloro into diphenyl ditelluride molecule reduces its toxicity. The data demonstrate that the chloro group introduced into diphenyl ditelluride molecule did not alter the acute oral toxicity in rats. The administration of compound 1a in rats only altered the urea level, while compound 1b caused alterations in all toxicological parameters analyzed (alanine aminotransferase and aspartate aminotransferase activities, urea and creatinine levels) in plasma of rats. The results of the present investigation support similar antioxidant and scavenging activities of 1a and 1b in rat liver homogenate in vitro. Furthermore, the presence of chloro into diphenyl ditelluride molecule did not alter the mortality index but increased toxicity of diphenyl ditelluride in rats.
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Affiliation(s)
- Simone Pinton
- Laboratório de Síntese, Reatividade e Avaliação Farmacológica e Toxicológica de Organocalcogênios, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP 97105-900 RS, Brazil
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19
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Gonçalves LC, Fiss GF, Perin G, Alves D, Jacob RG, Lenardão EJ. Glycerol as a promoting medium for cross-coupling reactions of diaryl diselenides with vinyl bromides. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.107] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Funchal C, Carvalho CAS, Gemelli T, Centeno AS, Guerra RB, Salvador M, Dani C, Coitinho A, Gomez R. Effect of Acute Administration of 3-Butyl-1-Phenyl-2-(Phenyltelluro)Oct-En-1-One on Oxidative Stress in Cerebral Cortex, Hippocampus, and Cerebellum of Rats. Cell Mol Neurobiol 2010; 30:1135-42. [DOI: 10.1007/s10571-010-9547-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2010] [Accepted: 07/10/2010] [Indexed: 12/22/2022]
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21
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Gay BM, Luchese C, Nogueira CW, Wendler P, Macedo A, Dos Santos AA. Antioxidant effect of functionalized alkyl-organotellurides: a studyin vitro. J Enzyme Inhib Med Chem 2010; 25:467-75. [DOI: 10.3109/14756360903257892] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Bibiana M. Gay
- Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Cristiane Luchese
- Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Cristina W. Nogueira
- Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - P. Wendler
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Alexandra Macedo
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
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22
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Avila DS, Colle D, Gubert P, Palma AS, Puntel G, Manarin F, Noremberg S, Nascimento PC, Aschner M, Rocha JBT, Soares FAA. A possible neuroprotective action of a vinylic telluride against Mn-induced neurotoxicity. Toxicol Sci 2010; 115:194-201. [PMID: 20133376 DOI: 10.1093/toxsci/kfq036] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Manganese (Mn) is a metal required by biological systems. However, environmental or occupational exposure to high levels of Mn can produce a neurological disorder called manganism, which has similarities to Parkinson's disease. Diethyl-2-phenyl-2-tellurophenyl vinylphosphonate (DPTVP) is an organotellurium compound with a high antioxidant activity, especially in the brain. The present study was designed to investigate the effects of long-term low-dose exposure to Mn in drinking water on behavioral and biochemical parameters in rats and to determine the effectiveness of vinylic telluride in attenuating the effects of Mn. After 4 months of treatment with MnCl(2) (13.7 mg/kg), rats exhibited clear signs of neurobehavioral toxicity, including a decrease in the number of rearings in the open field and altered motor performance in rotarod. The administration of DPTVP (0.150 micromol/kg, ip, 2 weeks) improved the motor performance of Mn-treated rats, indicating that the compound could be reverting Mn neurotoxicity. Ex vivo, we observed that Mn concentrations in the Mn-treated group were highest in the striatum, consistent with a statistically significant decrease in mitochondrial viability and [(3)H]glutamate uptake, and increased lipid peroxidation. Mn levels in the hippocampus and cortex were indistinguishable from controls, and no significant differences were noted in the ex vivo assays in these areas. Treatment with DPTVP fully reversed the biochemical parameters altered by Mn. Furthermore, DPTVP treatment was also associated with a reduction in striatal Mn levels. Our results demonstrate that DPTVP has neuroprotective activity against Mn-induced neurotoxicity, which may be attributed to its antioxidant activity and/or its effect on striatal Mn transport.
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Affiliation(s)
- Daiana S Avila
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
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23
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Carvalho CAS, Gemelli T, Guerra RB, Oliboni L, Salvador M, Dani C, Araújo AS, Mascarenhas M, Funchal C. Effect of in vitro exposure of human serum to 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one on oxidative stress. Mol Cell Biochem 2009; 332:127-34. [PMID: 19554424 DOI: 10.1007/s11010-009-0182-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Accepted: 06/09/2009] [Indexed: 01/24/2023]
Abstract
The objective of this study was to verify the effect of the organochalcogen 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one on some parameters of oxidative stress in human serum. Serum of volunteers were incubated for 30 min in the presence or absence of 1, 10, or 30 microM of 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one and oxidative stress was measured. First, we tested the influence of the compound on 1,1-diphenyl-2-picrylhydrazyl (DPPH(*)) radical-scavenging and verified that the organotellurium did not have any antioxidant properties. The organochalcogen was capable to enhance TBARS but the compound was not able to alter carbonyl assay. Furthermore, the organochalcogen provoked a reduction of protein thiol groups measured by the sulfhydryl assay. Moreover, the organotellurium enhanced the activity of catalase and superoxide dismutase, inhibited the activity of glutathione peroxidase and did not modify the glutathione S-transferase activity. Furthermore, nitric oxide production and hydroxyl radical activity were not affected by the compound. Our findings showed that this organochalcogen induces oxidative stress in human serum, indicating that this compound is potentially toxic to human beings.
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Affiliation(s)
- Carlos Augusto Souza Carvalho
- Rede Metodista de Educação do Sul, Centro Universitário Metodista IPA. Rua Cel. Joaquim Pedro Salgado, 80, Porto Alegre, RS, 90420-060, Brazil
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24
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Penz J, Gemelli T, Carvalho CAS, Guerra RB, Oliboni L, Salvador M, Dani C, Araújo AS, Funchal C. Effect of 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one on oxidative stress in cerebral cortex of rats. Food Chem Toxicol 2009; 47:745-51. [DOI: 10.1016/j.fct.2009.01.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2008] [Revised: 12/11/2008] [Accepted: 01/04/2009] [Indexed: 01/25/2023]
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25
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Csp3-tellurium copper cross-coupling: synthesis of alkynyl tellurides a novel class of antidepressive-like compounds. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2008.12.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Souza ACG, Luchese C, Santos Neto JS, Nogueira CW. Antioxidant effect of a novel class of telluroacetilene compounds: studies in vitro and in vivo. Life Sci 2009; 84:351-7. [PMID: 19167407 DOI: 10.1016/j.lfs.2008.12.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 11/20/2008] [Accepted: 12/29/2008] [Indexed: 10/21/2022]
Abstract
AIMS The effect of telluroacetylenes a-d on pharmacological assays was investigated in vitro. A second objective of this study was to investigate the antioxidant action of compound b against the oxidative damage induced by sodium nitroprusside (SNP) in mouse brain. MAIN METHODS In in vitro experiments, lipid peroxidation (LP) and protein carbonyl (PC) levels and delta-aminolevulinate dehydratase (delta-ALA-D) activity were carried out in rat brain homogenate. The thiol peroxidase-like activity and DPPH radical scavenging of telluroacetylenes a-d were investigated. In in vivo experiments, mice received SNP (0.335 micromol per site) intra cerebroventricular (i.c.v.) thirty minutes after oral administration of telluroacetylene b (10 mg/kg). After 1 h, animals were euthanized. The levels of LP and delta-ALA-D, catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR), glutathione S-transferase (GST) activities were carried out in mouse brain homogenate. KEY FINDINGS Telluroacetylenes a-d, at low muM range, reduced LP and PC levels in rat brain homogenate. Telluroacetylenes a-d showed effect of scavenging DPPH radicals. delta-ALA-D activity was inhibited by telloruacetylenes a-d, at high muM range, in rat brain homogenate. Brains of mice treated with SNP showed an increase in LP and the reduction in delta-ALA-D, GR and GST activities. Telluroacetylene b protected against the oxidative stress caused by SNP in brain of rats. SIGNIFICANCE The results support an antioxidant effect of telluroacetylenes a-d in vitro. Telluroacetylene b protected against oxidative damage caused by SNP in mouse brain, suggesting an antioxidant effect of this compound.
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Affiliation(s)
- Ana Cristina G Souza
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP 97105-900, RS, Brazil
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27
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Borges VC, Savegnago L, Pinton S, Jesse CR, Alves D, Nogueira CW. Vinylic telluride derivatives as promising pharmacological compounds with low toxicity. J Appl Toxicol 2008; 28:839-48. [DOI: 10.1002/jat.1345] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Favero AM, Weis SN, Stangherlin EC, Rocha JBT, Nogueira CW. Sub-chronic exposure of adult male rats to diphenyl ditelluride did not affect the development of their progeny. Food Chem Toxicol 2007; 45:859-62. [PMID: 17184891 DOI: 10.1016/j.fct.2006.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2006] [Revised: 10/23/2006] [Accepted: 11/07/2006] [Indexed: 11/21/2022]
Abstract
The present study was undertaken to evaluate the toxicity of diphenyl ditelluride [(PhTe)(2)] exposure on the progeny of Wistar male rats. Male rats were exposed to (PhTe)(2) subcutaneously for 4 weeks (wk) at the dose of 0.006 mg/kg and 8-wk at the dose of 0.003 mg/kg, prior to mating with unexposed females. The body and sex organ weights of male rats were not affected in both 4- and 8-wk (PhTe)(2)-exposed groups. The gravid uterus weight and the body weight gain (overall or corrected) during the pregnancy were not statistically different to those obtained from females mated with control males. The number of implantation sites, resorptions and live and dead fetuses were not affected by male exposure to (PhTe)(2). Fetal body weight and crown-rump length were not affected, as well. Examination of the fetuses from both exposed groups for external and skeletal changes did not reveal any male-mediated effect of (PhTe)(2). The current study indicated that (PhTe)(2) given sub-chronically (4- or 8-wk) to male rats had no adverse effects on their progeny.
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Affiliation(s)
- Alexandre Marafon Favero
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, Brazil
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29
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Avila DS, Gubert P, Dalla Corte CL, Alves D, Nogueira CW, Rocha JBT, Soares FAA. A biochemical and toxicological study with diethyl 2-phenyl-2-tellurophenyl vinylphosphonate in a sub-chronic intraperitoneal treatment in mice. Life Sci 2007; 80:1865-72. [PMID: 17383683 DOI: 10.1016/j.lfs.2007.02.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Revised: 02/06/2007] [Accepted: 02/15/2007] [Indexed: 11/25/2022]
Abstract
Diethyl-2-phenyl-2-tellurophenyl vinylphosphonate (DPTVP) is an organotellurium compound with low toxicity after subcutaneous administration in mice. This study evaluated possible in vivo and ex vivo toxicological effects of daily injections of DPTVP for 12 days in mice, using the intraperitoneal administration. This route potentially increases the pharmacokinetics of absorption, distribution, metabolism and toxicity of DPTVP. Treatment with DPTVP (0, 30, 50, 75, 100, 250, 350 or 500 micromol/kg) were not associated with mortality or body weight loss. Nevertheless, the liver and liver-to-body weight ratio increased in groups treated with 350 and 500 micromol/kg of DPTVP. However, plasmatic aspartate and alanine aminotransferase activities (classical markers of hepatotoxicity) were not increased after diethyl-2-phenyl-2-tellurophenyl vinylphosphonate administration. Hepatic, renal and cerebral thiobarbituric acid reactive substances (TBARS), delta-ALA-D activity and Vitamin C levels were not modified after DPTVP treatment. Renal and hepatic superoxide dismutase (SOD) and catalase (CAT) were unchanged after DPTVP treatment. Conversely, SOD activity significantly increased in brain in groups treated with 50, 75, 100 and 500 micromol/kg of DPTVP treated groups. Our findings corroborates that brain is a potential target for organochalcogen action. The absence of severe overt signs of toxicity after sub-chronic exposure to DPTVP reinforces the necessity for more detailed pharmacological studies concerning this new organotellurium compound.
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Affiliation(s)
- Daiana Silva Avila
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, CEP 97105-900, Santa Maria, RS, Brazil
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